search for: 11yrs

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2009 Jan 29
1
Question On CrossTable function in gmodels package
...ed within another object. For example: >library(gmodels) >data(infert, package = "datasets") > CrossTable(infert$education, infert$induced)->aa # the function prints everything ok on the screen > aa # works just fine $t y x 0 1 2 0-5yrs 4 2 6 6-11yrs 78 27 15 12+ yrs 61 39 16 ?????. But when I call >CrossTable(infert$education, infert$induced, asresid=TRUE, format="SPSS")->aaa # the function prints everything ok on the screen > aaa # now I have a problem NULL Why is aaa object NULL? Should it be NULL? I suspect it has s...
2011 Dec 13
8
How to compute 95%CI for OR from logistic regression?
Hi all: My data has 3 variables: age(3levels : <30y=1 30-50y=2, >50y=3) gender(Male=0, Female=1) CD4 cell count(raw lab measurement) y(1:death 0:alive) I perform logistic regression to find out the factors that influence y. result<-glm(y ~ factor(age) + factor(gender) + CD4,family = binomial) >From the result,I can get OR(Odds Ratio) of gender via exp(Estimate of Female,
2005 Jun 23
1
the dimname of a table
i have a data frame(dat) which has many variables.and i use the following script to get the crosstable. >danx2<-c("x1.1","x1.2","x1.3","x1.4","x1.5","x2","x4","x5","x6","x7","x8.1","x8.2","x8.3","x8.4","x11",